Gas burner especially useful for glazing glassware

ABSTRACT

D R A W I N G A GAS BURNER FOR PRODUCING A TYPE OF FLAME ESPECIALLY USEFUL IN THE GLAZING OF GLASSWARE. IT COMPRISES AN ELONGATED DISTRIBUTION CHAMBER HAVING A NARROW INLET SLOT IN ITS REAR WALL AND FORWARDLY SPACED PERFORATED BAFFLE PLATES SO ARRANGED AS TO BREAK UP THE GAS INTRODUCED THROUGH THE INLET SLOT UNDER HIGH PRESSURE TO PREVENT IT FROM BLOWING OUT FROM THE CHAMBER EXCESSIVELY AND SO THAT A WIDE SURFACE, UNIFORM TEMPERATURE FLAME IS PRODUCED WHICH IS ESPECIALLY SUITABLE FOR THE GLAZING OF GLASSWARE.

Feb. 6, 1973 w, MAMFOLD 3,715,183

GAS BURNER ESPECIALLY USEFUL FOR GLAZING GLASSWARE Filed me 15, 1971 2 Sheets-Sheet 2 INVENTOR. RICHARD W. MANIFOLD MAHONEY, MILLER 8 STEBENS BYifi /f A T TORNE YS United States Patent Office 3,715,183 Patented Feb. 6, 1973 3,715,183 GAS BURNER ESPECIALLY USEFUL FOR GLAZING GLASSWARE Richard W. Manifold, Reynoldsburg, Ohio, asslgnor to Manifold & Phalor Machine Co., Reynoldsburg, Ohio Filed June 15, 1971, Ser. No. 153,283 Int. Cl. F23d 13/12 U.S. Cl. 431-328 Claims ABSTRACT OF THE DISCLOSURE Most burner arrangements are provided 'with single circular apertures or rows thereof to produce points or ribbons of flames. Such flames are usually hot at the r outer envelopes or shells but are relatively cold at their interiors. The points or ribbons of flames are not suitable for glazing glassware which requires large areas or blankets of flame of uniformly high temperature. The present invention provides a burner structure in which the gas can be supplied under unusually high pressure, will be broken up to prevent it from just blowing out of the burner chamber, and will be formed into a blanket of flame of uniformly high temperature which can envelope the glassware and effectively glaze it.

The best mode contemplated in carrying out my invention is illustrated in the accompanying drawings in which:

FIG. 1 is a plan view of the burner.

FIG. 2 is a front elevational view of the burner.

FIG. 3 is an end elevational view of the burner.

FIG. 4 is an enlarged transverse sectional view through the burner taken along line 4-4 of FIG. 2.

With reference to the drawings, as an example of my invention, I show a burner which comprises a main casing of cylindrical form. This casing 10 may be formed from a pipe length of circular cross-section which has its opposed ends closed by cap discs 11 which may be welded in place. This main casing provides a main supply chamber 12 which receives the gas mixture from a suitable source connected to'an inlet fitting 13 at the top of the casing 10 midway of the length thereof. The bottom of the casing on its exterior may carry mounting plates 14 adjacent its ends which may be used in mounting the burner on a glass glazing or other machine.

Projecting radially forwardly at the front of the main casing 10 is an elongated rectangular extension 15. This extension provides a gas mixture distributing chamber 16 extending the full length of the burner. It includes the vertically spaced upper and lower horizontal walls 17 which are disposed in parallel relationship and extend forwardly from the casing 10. These walls may be formed of strips of metal having their rear edges welded to the casing. The spaces at the ends of the walls 17 are closed by small plates 18 which may be welded thereto, thus completing the rectangular extension.

To provide for passage of the gas mixture from the supply chamber 12 to the distributor chamber 16, an inlet slot 20 is provided in the forward side of the casing 10 and extends the full length thereof. This inlet slot 20 is relatively narrow and may be formed by slitting the casing 10. It is located midway between the upper and lower 2 walls 17 of the extension 15. It is of much less width or height than the space or chamber 16 between these walls.

As previously indicated, within the chamber 16 are baffles which break up the gas supplied to the chamber 16 through the slot 20 and prevent it from merely blowing out from the chamber. These baflles are shown as being two in number and comprise a rear baffle 21 and a forward baflie 22. These baffles 21 and 22 are in the form of perforated plates with the perforations throughout the areas of the respective plates. The respective plates 21 and 22 are positioned in elongated retaining slots 23 formed in the walls of the chamber 16. The location of the plates 21 and 22 is critical. It will be noted that the plate 21 is located forwardly of the inlet slot 20 and the plate 22 is spaced forwardly of the plate 21. However, it will be further noted that the plate 22 is spaced behind the outer lip or edge 24 of the extension 15. This provides an extension 16a of the chamber 16 beyond the plate 22 which will serve to form and hold the blanket of flame.

The inner screen 21 preferably has smaller openings than the outer screen 22. Also, it is preferred that the openings 21a of the inner screen be out of alignment with the openings 22a of the outer screen. The result of this arrangement is that higher pressure gas can be used without blowing out of the chamber 16 and its extension 16a.

As previously indicated, the width of the inlet slot 20 is critical and to maintain this width accurately under expansion and contraction of the casing 10, spacer pin units 25 are provided within the casing and extending across the slot 20. These spacers are provided with inner sh0ulders 26 for engaging the casing wall inner surface and outer battered ends 27 for engaging the outer surface of the casing. Similar spacer pin units 25a are provided within the extension 15 at longitudinally spaced intervals and provided with shoulders 26a for engaging the inner surfaces of the respective walls 17 and battered ends 27a for engaging the outer surfaces of the Walls 17. These latter spacers 25a also aid in maintaining the width of the slot 20 as well as preventing spreading of the walls 17 of the extension 15 which might permit displacement of the perforated baffle plates 21 and 22.

The air and gas mixture introduced under high pressure from a suitable source into the chamber 12 will pass outwardly through the slot 20 into the chamber 16. As it passes from the chamber 12 into the chamber 16 through the slot 20, it will expand and will first engage the baflie plate 21 which will serve to break up the stream and uniformly distribute it as it passes on through the openings 21a thereof. The mixture will next engage the baflle plate 22 which will serve to effectively break up the stream since the openings 22a thereof are out of alignment with the openings 21:: of the plate 21. The mixture will pass into the chamber extension 16a where the blanket of flame will be formed, as indicated diagrammatically in FIG. 3. This type of blanket flame will be especially suitable for glazing glassware.

In order to prevent pockets of gas at the end of the casing 10, it is preferred that baflie discs 12a be disposed within those ends and be directed forwardly and outwardly toward the slot 20.

Thus, the arrangement described will result in the control of the gas flow and the distribution of it to attain the desired even temperature surface flame, the surface being very extensive as compared to the usual pointed or tipped flame.

It will be apparent that I have provided a novel burner structure which is simple and can be manufactured at a low cost. However, it will be very effective in using a gas mixture under high pressure and in producing a blanket type flame suitable for glazing glassware or other analogous operations.

Having thus described my invention, what is claimed is:

1. A gas burner comprising a casing providing a gas supply chamber therewithin, an elongated distributor chamber connected to the casing by an inlet disposed along the distributor chamber, and spaced perforated bafiie plates located Within said distributor chamber outwardly of said inlet, said inlet being a longitudinal slot, and at least two of the baffle plates being provided and including an inner plate spaced outwardly of the inlet slot, and an outer p l-a-te spaced outwardly'of the inner plate, said distributor chamber having an outer lip and the outer plate being spaced inwardly thereof to provide a flame-forming chamber beyond the outer plate, said casing being of annular tubular form and the inlet slot being in the wall thereof and extending longitudinally thereof, a radial extension on said casing and extending longitudinally thereof in which said distributor chamber is provided, said extension having spaced Walls connected to the casing spaced from and parallel to said slot, said outer lip being at the outer edges of said walls.

2. A gas burner according to claim 1 including spacers secured within the casing at longitudinally spaced positions and connected to the walls of the casing to maintain the width of said slot.

3. A gas burner according to claim 2 including spacers secured within the extension to said spaced walls to maintain the spacing thereof.

4. A burner according to claim 3 including angularly disposed bafiie plates in the end of the gas supply chamber within the casing for directing the gas from the end of the supply chamber towards said slot inlet.

5. A gas burner according to claim 1 in which the respective perforated plates have openings of different sizes and out of alignment.

References Cited UNITED STATES PATENTS 3,445,175 5/1969 Krieger 431-328 1,078,726 11/1913 Fisher 431-328 X 3,526,367 9/1970 Trihey 239-556 FOREIGN PATENTS 738,534 10/1955 Great Britain 239-5533 CARROLL B. DORITY, JR., Primary Examiner US. Cl. X.R. 

